For each of the following statements, indicate whether the statement is TRUE or FALSE. If the statement is false, explain why it is false. a. The ratio of nucleotides in double-stranded DNA agrees with the rule (A + T) = (G + C).

b. In a DNA double helix that is not currently being replicated, the two DNA strands are the same age (i. e. they were both synthesized at the same time).

c. The leading strand requires a primer at the origin of replication

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?